A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted to a 10 A ammeter, the shunt resistance is
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(a) 0.01 W |
(b) 0.05 W |
(c) 2000 W |
(d) 5000 W |
(b) 0.05 W
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A real image is formed by:
Three positive charges of equal value q are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in
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(a)
|
(b)
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(c)
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(d)
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The plate current in a triode is given by 
where Ip, Vp and Vg are the values of plate current, plate voltage and grid voltage, respectively. What are the triode parameters m, rp and gm for the operating point at 
and 
?
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(a) 10, 16.7 kW, 0.6 m mho |
(b) 15, 16.7 kW, 0.06 m mho |
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(c) 20, 6 kW, 16.7 m mho |
(d) None of these |
If the amplification factor of a triode (m) is 22 and its plate resistance is 6600 ohm, then the mutual conductance of this valve is mho is
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(a) |
(b) 25 |
(c) |
(d) |
Amount of light entering into the camera depends upon
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(a) Focal length of the objective lens |
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(b) Product of focal length and diameter of the objective lens |
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(c) Distance of the object from camera |
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(d) Aperture setting of the camera |
